nymaim | b7738538bb63f96968f57448382e1fa813dc521f0396c56ce2a4e568933292c4

Analysis

max time kernel
112s
max time network
177s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
06/12/2022, 21:46

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General

Target
file.exe
Size 3.8MB
Sample221206-1mlrysac7x
SHA256 b7738538bb63f96968f57448382e1fa813dc521f0396c56ce2a4e568933292c4
MD5 5e4448a5847ad2577f6b4a6145c48b98
SHA1 0c3438cf104bb5b8fc7b72a518be80bdfb0e8bba
SHA512 1581df426881440f95e51e2c7f449f6ad4c37a53e7ebdf9048c5e9f16d0c128aa7daa4343b4fa4390d1e91457da675067a16f208f277aa2e1b4f086660a3ded2
SSDEEP 98304:2pluRCsO7nDzCCeP2hChoWcFjeQNF06xE6fh+COFp3:zAzmtcFjeQNOmRu5
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
1108	is-EOTRF.tmp
1532	PrintFolders.exe
1784	KpSEan3ozD.exe

Loads dropped DLL 10 IoCs

pid	Process
1348	file.exe
1108	is-EOTRF.tmp
1108	is-EOTRF.tmp
1108	is-EOTRF.tmp
1108	is-EOTRF.tmp
1532	PrintFolders.exe
1532	PrintFolders.exe
1532	PrintFolders.exe
1784	KpSEan3ozD.exe
1784	KpSEan3ozD.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\is-PAC73.tmp	is-EOTRF.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-EOTRF.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-EOTRF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5NT9R.tmp	is-EOTRF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QUR7K.tmp	is-EOTRF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-657UO.tmp	is-EOTRF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-122TK.tmp	is-EOTRF.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GLQGB.tmp	is-EOTRF.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-EOTRF.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
1520	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1532	PrintFolders.exe
1532	PrintFolders.exe
1532	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	taskkill.exe
Token: SeRestorePrivilege	1108	is-EOTRF.tmp
Token: SeBackupPrivilege	1108	is-EOTRF.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1348 wrote to memory of 1108	1348	file.exe	27
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1108 wrote to memory of 1532	1108	is-EOTRF.tmp	28
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1784	1532	PrintFolders.exe	29
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1532 wrote to memory of 1472	1532	PrintFolders.exe	32
PID 1472 wrote to memory of 1520	1472	cmd.exe	34
PID 1472 wrote to memory of 1520	1472	cmd.exe	34
PID 1472 wrote to memory of 1520	1472	cmd.exe	34
PID 1472 wrote to memory of 1520	1472	cmd.exe	34
PID 1472 wrote to memory of 1520	1472	cmd.exe	34
PID 1472 wrote to memory of 1520	1472	cmd.exe	34
PID 1472 wrote to memory of 1520	1472	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:1348
- C:\Users\Admin\AppData\Local\Temp\is-MSI17.tmp\is-EOTRF.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-MSI17.tmp\is-EOTRF.tmp" /SL4 $70120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3695798 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1108
- - 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:1532
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\KpSEan3ozD.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1784
  - - 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:1472
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1520

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 6.3MB
SHA256 eb821783b9469fce0bea286bd4caa7f60d31dc6e7f7623f23c562da49866676f
MD5 36650c1cd7ced15ddfa798a1c47b09dc
SHA1 7893873711dfd2589c39ae10cc9414cafb54f95b
SHA512 ad63dca4096633be17c2c5a8bc69bb111fdc051413ab9fe439af61ee834c0f5f013c62d079482e1f55c53533b15ec565b745f45b7a0b30cd25abcc76833a4a21
SSDEEP 98304:Qxwjd75PniyBESMqpRobg9XMBzFOxKcYknrmNo4:Qxe75FEnho4
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.3MB
SHA256 eb821783b9469fce0bea286bd4caa7f60d31dc6e7f7623f23c562da49866676f
MD5 36650c1cd7ced15ddfa798a1c47b09dc
SHA1 7893873711dfd2589c39ae10cc9414cafb54f95b
SHA512 ad63dca4096633be17c2c5a8bc69bb111fdc051413ab9fe439af61ee834c0f5f013c62d079482e1f55c53533b15ec565b745f45b7a0b30cd25abcc76833a4a21
SSDEEP 98304:Qxwjd75PniyBESMqpRobg9XMBzFOxKcYknrmNo4:Qxe75FEnho4
MD5 SHA1 SHA512 SSDEEP

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is-EOTRF.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MSI17.tmp\is-EOTRF.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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is-EOTRF.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MSI17.tmp\is-EOTRF.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

Submit Download

KpSEan3ozD.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\KpSEan3ozD.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

KpSEan3ozD.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\KpSEan3ozD.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.3MB
SHA256 eb821783b9469fce0bea286bd4caa7f60d31dc6e7f7623f23c562da49866676f
MD5 36650c1cd7ced15ddfa798a1c47b09dc
SHA1 7893873711dfd2589c39ae10cc9414cafb54f95b
SHA512 ad63dca4096633be17c2c5a8bc69bb111fdc051413ab9fe439af61ee834c0f5f013c62d079482e1f55c53533b15ec565b745f45b7a0b30cd25abcc76833a4a21
SSDEEP 98304:Qxwjd75PniyBESMqpRobg9XMBzFOxKcYknrmNo4:Qxe75FEnho4
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.3MB
SHA256 eb821783b9469fce0bea286bd4caa7f60d31dc6e7f7623f23c562da49866676f
MD5 36650c1cd7ced15ddfa798a1c47b09dc
SHA1 7893873711dfd2589c39ae10cc9414cafb54f95b
SHA512 ad63dca4096633be17c2c5a8bc69bb111fdc051413ab9fe439af61ee834c0f5f013c62d079482e1f55c53533b15ec565b745f45b7a0b30cd25abcc76833a4a21
SSDEEP 98304:Qxwjd75PniyBESMqpRobg9XMBzFOxKcYknrmNo4:Qxe75FEnho4
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.3MB
SHA256 eb821783b9469fce0bea286bd4caa7f60d31dc6e7f7623f23c562da49866676f
MD5 36650c1cd7ced15ddfa798a1c47b09dc
SHA1 7893873711dfd2589c39ae10cc9414cafb54f95b
SHA512 ad63dca4096633be17c2c5a8bc69bb111fdc051413ab9fe439af61ee834c0f5f013c62d079482e1f55c53533b15ec565b745f45b7a0b30cd25abcc76833a4a21
SSDEEP 98304:Qxwjd75PniyBESMqpRobg9XMBzFOxKcYknrmNo4:Qxe75FEnho4
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-EOTRF.tmp

Path \Users\Admin\AppData\Local\Temp\is-MSI17.tmp\is-EOTRF.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-UHVJB.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-UHVJB.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-UHVJB.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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KpSEan3ozD.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\KpSEan3ozD.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

KpSEan3ozD.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\KpSEan3ozD.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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KpSEan3ozD.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\KpSEan3ozD.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/1108-73-0x0000000003040000-0x0000000004482000-memory.dmp

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memory/1108-86-0x0000000003040000-0x0000000004482000-memory.dmp

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memory/1348-55-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1348-98-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1348-54-0x0000000075071000-0x0000000075073000-memory.dmp

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memory/1348-62-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1532-77-0x0000000000400000-0x0000000001842000-memory.dmp

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memory/1532-78-0x0000000000400000-0x0000000001842000-memory.dmp

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memory/1532-87-0x0000000000400000-0x0000000001842000-memory.dmp

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memory/1532-88-0x0000000001DF0000-0x0000000003232000-memory.dmp

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memory/1532-89-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1532-76-0x0000000001DF0000-0x0000000003232000-memory.dmp

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memory/1532-75-0x0000000001DF0000-0x0000000003232000-memory.dmp

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memory/1532-97-0x0000000000400000-0x0000000001842000-memory.dmp

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memory/1532-74-0x0000000000400000-0x0000000001842000-memory.dmp

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