nymaim | cf0825f436e496af384d7340307d97d74c41e2439ec4e9815df2d63042e9e647

Analysis

max time kernel
59s
max time network
67s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
02/12/2022, 00:47

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General

Target
file.exe
Size 2.0MB
Sample221202-a481psgb93
SHA256 cf0825f436e496af384d7340307d97d74c41e2439ec4e9815df2d63042e9e647
MD5 0c80ded908d5fce1f8e2aaadfdabc468
SHA1 8a8c3e04a7bbd82566e5b03839fd3f22d3fd109f
SHA512 4bf7af91adcfb7bfb3ea6c3ad2e973ba2b3d974819bf0cf332a287829a80574d9db1d5a43327fe82f3f18bd53c05a14818a9e80f919fa1aeae5db2eed4de3ba9
SSDEEP 49152:8xkw25JsJQPpf8Pq6bspSMhDf0in23tlLbwuydOsfR9oCHoXoAG5cyI:8xkw2YJOpf64Vf0xXUCsfR2woYXcyI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
900	is-F3R36.tmp
2040	PrintFolders.exe
1764	cjJwRxOjofvGX.exe

Loads dropped DLL 10 IoCs

pid	Process
828	file.exe
900	is-F3R36.tmp
900	is-F3R36.tmp
900	is-F3R36.tmp
900	is-F3R36.tmp
2040	PrintFolders.exe
2040	PrintFolders.exe
2040	PrintFolders.exe
1764	cjJwRxOjofvGX.exe
1764	cjJwRxOjofvGX.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-F3R36.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N07GB.tmp	is-F3R36.tmp
File created	C:\Program Files (x86)\PrintFolders\is-00IC6.tmp	is-F3R36.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S7JRJ.tmp	is-F3R36.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TKNBR.tmp	is-F3R36.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S1ASK.tmp	is-F3R36.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QILEB.tmp	is-F3R36.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-F3R36.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-F3R36.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
2000	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2040	PrintFolders.exe
2040	PrintFolders.exe
2040	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	taskkill.exe
Token: SeRestorePrivilege	900	is-F3R36.tmp
Token: SeBackupPrivilege	900	is-F3R36.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 828 wrote to memory of 900	828	file.exe	27
PID 828 wrote to memory of 900	828	file.exe	27
PID 828 wrote to memory of 900	828	file.exe	27
PID 828 wrote to memory of 900	828	file.exe	27
PID 828 wrote to memory of 900	828	file.exe	27
PID 828 wrote to memory of 900	828	file.exe	27
PID 828 wrote to memory of 900	828	file.exe	27
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 900 wrote to memory of 2040	900	is-F3R36.tmp	28
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1764	2040	PrintFolders.exe	29
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 2040 wrote to memory of 1992	2040	PrintFolders.exe	32
PID 1992 wrote to memory of 2000	1992	cmd.exe	34
PID 1992 wrote to memory of 2000	1992	cmd.exe	34
PID 1992 wrote to memory of 2000	1992	cmd.exe	34
PID 1992 wrote to memory of 2000	1992	cmd.exe	34
PID 1992 wrote to memory of 2000	1992	cmd.exe	34
PID 1992 wrote to memory of 2000	1992	cmd.exe	34
PID 1992 wrote to memory of 2000	1992	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:828
- C:\Users\Admin\AppData\Local\Temp\is-MH4GU.tmp\is-F3R36.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-MH4GU.tmp\is-F3R36.tmp" /SL4 $80124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1912604 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:900
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2040
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cjJwRxOjofvGX.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1764
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1992
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 28bb55ebd5f222b0f14bc756a5ea7569540f4f9df11d01d17dad1d67257c6cee
MD5 fb547348e2a743461ad1e2f0fb2f4c0e
SHA1 23ed8a5c05451f5f590624df609004f928b5d457
SHA512 948a03c45648b7f8f0bd427b47e1c63a7400f4885662c840760f70dc9a36f384ab009db2d7718a47ac3833a6017c9e25332ddcdde1aaf01fce579a5db71f689a
SSDEEP 98304:eZGLp20mPaSMG1dio6Nri7cmvkEK5kpbFcZGY:V20mBarPpuu4Y
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 28bb55ebd5f222b0f14bc756a5ea7569540f4f9df11d01d17dad1d67257c6cee
MD5 fb547348e2a743461ad1e2f0fb2f4c0e
SHA1 23ed8a5c05451f5f590624df609004f928b5d457
SHA512 948a03c45648b7f8f0bd427b47e1c63a7400f4885662c840760f70dc9a36f384ab009db2d7718a47ac3833a6017c9e25332ddcdde1aaf01fce579a5db71f689a
SSDEEP 98304:eZGLp20mPaSMG1dio6Nri7cmvkEK5kpbFcZGY:V20mBarPpuu4Y
MD5 SHA1 SHA512 SSDEEP

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is-F3R36.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MH4GU.tmp\is-F3R36.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-F3R36.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MH4GU.tmp\is-F3R36.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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cjJwRxOjofvGX.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cjJwRxOjofvGX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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cjJwRxOjofvGX.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cjJwRxOjofvGX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 28bb55ebd5f222b0f14bc756a5ea7569540f4f9df11d01d17dad1d67257c6cee
MD5 fb547348e2a743461ad1e2f0fb2f4c0e
SHA1 23ed8a5c05451f5f590624df609004f928b5d457
SHA512 948a03c45648b7f8f0bd427b47e1c63a7400f4885662c840760f70dc9a36f384ab009db2d7718a47ac3833a6017c9e25332ddcdde1aaf01fce579a5db71f689a
SSDEEP 98304:eZGLp20mPaSMG1dio6Nri7cmvkEK5kpbFcZGY:V20mBarPpuu4Y
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 28bb55ebd5f222b0f14bc756a5ea7569540f4f9df11d01d17dad1d67257c6cee
MD5 fb547348e2a743461ad1e2f0fb2f4c0e
SHA1 23ed8a5c05451f5f590624df609004f928b5d457
SHA512 948a03c45648b7f8f0bd427b47e1c63a7400f4885662c840760f70dc9a36f384ab009db2d7718a47ac3833a6017c9e25332ddcdde1aaf01fce579a5db71f689a
SSDEEP 98304:eZGLp20mPaSMG1dio6Nri7cmvkEK5kpbFcZGY:V20mBarPpuu4Y
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 28bb55ebd5f222b0f14bc756a5ea7569540f4f9df11d01d17dad1d67257c6cee
MD5 fb547348e2a743461ad1e2f0fb2f4c0e
SHA1 23ed8a5c05451f5f590624df609004f928b5d457
SHA512 948a03c45648b7f8f0bd427b47e1c63a7400f4885662c840760f70dc9a36f384ab009db2d7718a47ac3833a6017c9e25332ddcdde1aaf01fce579a5db71f689a
SSDEEP 98304:eZGLp20mPaSMG1dio6Nri7cmvkEK5kpbFcZGY:V20mBarPpuu4Y
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-9AO5N.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-9AO5N.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-9AO5N.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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is-F3R36.tmp

Path \Users\Admin\AppData\Local\Temp\is-MH4GU.tmp\is-F3R36.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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cjJwRxOjofvGX.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cjJwRxOjofvGX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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cjJwRxOjofvGX.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cjJwRxOjofvGX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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cjJwRxOjofvGX.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\cjJwRxOjofvGX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/828-55-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/828-62-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/828-97-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/828-54-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

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memory/900-90-0x0000000002F30000-0x0000000004065000-memory.dmp

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memory/900-73-0x0000000002F30000-0x0000000004065000-memory.dmp

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memory/2040-78-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2040-86-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2040-74-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2040-91-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2040-76-0x0000000001BE0000-0x0000000002D15000-memory.dmp

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memory/2040-77-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2040-96-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2040-75-0x0000000001BE0000-0x0000000002D15000-memory.dmp

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