nymaim | a76e95d36b5d559a64299a1f9779ff165b8c9609b84c8193e870401a491e519c

Analysis

max time kernel
63s
max time network
66s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
30/10/2022, 00:46

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General

Target
file.exe
Size 2.5MB
Sample221030-a4msgadhe5
SHA256 a76e95d36b5d559a64299a1f9779ff165b8c9609b84c8193e870401a491e519c
MD5 e868098dc13488d3aad7e6ea0a8c37bf
SHA1 8752dcdeeb0053f14e917d44b467515703cab602
SHA512 3e96a46b617fef0bf7653528a9c51ca9c6a213522196804aa741bceef4193e85cf2468bcd4ecfed3d056b9e41828ef89bd72a0b843a210534cbd55142f0acb28
SSDEEP 49152:Z2ll/m9ygUwA4QzL2w3l5kS/dWeTbwXs+7j6HaaIkxSA5hq:Mll/m9yB9iSTPdWEbwXpj6nf/Dq
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
1240	is-1LJBQ.tmp
2032	fdsearcher63.exe
1524	5Caiccruwa.exe

Loads dropped DLL 6 IoCs

pid	Process
832	file.exe
1240	is-1LJBQ.tmp
1240	is-1LJBQ.tmp
1240	is-1LJBQ.tmp
1240	is-1LJBQ.tmp
2032	fdsearcher63.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\fdSearcher\is-4KMQ3.tmp	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-FBEAI.tmp	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-CCA37.tmp	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-7C728.tmp	is-1LJBQ.tmp
File opened for modification	C:\Program Files (x86)\fdSearcher\unins000.dat	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\unins000.dat	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-CU0Q0.tmp	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-OBF17.tmp	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-98BJF.tmp	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-00MEN.tmp	is-1LJBQ.tmp
File opened for modification	C:\Program Files (x86)\fdSearcher\fdsearcher63.exe	is-1LJBQ.tmp
File created	C:\Program Files (x86)\fdSearcher\is-OICM7.tmp	is-1LJBQ.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
1696	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2032	fdsearcher63.exe
2032	fdsearcher63.exe
2032	fdsearcher63.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 832 wrote to memory of 1240	832	file.exe	28
PID 832 wrote to memory of 1240	832	file.exe	28
PID 832 wrote to memory of 1240	832	file.exe	28
PID 832 wrote to memory of 1240	832	file.exe	28
PID 832 wrote to memory of 1240	832	file.exe	28
PID 832 wrote to memory of 1240	832	file.exe	28
PID 832 wrote to memory of 1240	832	file.exe	28
PID 1240 wrote to memory of 2032	1240	is-1LJBQ.tmp	29
PID 1240 wrote to memory of 2032	1240	is-1LJBQ.tmp	29
PID 1240 wrote to memory of 2032	1240	is-1LJBQ.tmp	29
PID 1240 wrote to memory of 2032	1240	is-1LJBQ.tmp	29
PID 2032 wrote to memory of 1524	2032	fdsearcher63.exe	32
PID 2032 wrote to memory of 1524	2032	fdsearcher63.exe	32
PID 2032 wrote to memory of 1524	2032	fdsearcher63.exe	32
PID 2032 wrote to memory of 1524	2032	fdsearcher63.exe	32
PID 2032 wrote to memory of 1724	2032	fdsearcher63.exe	33
PID 2032 wrote to memory of 1724	2032	fdsearcher63.exe	33
PID 2032 wrote to memory of 1724	2032	fdsearcher63.exe	33
PID 2032 wrote to memory of 1724	2032	fdsearcher63.exe	33
PID 1724 wrote to memory of 1696	1724	cmd.exe	35
PID 1724 wrote to memory of 1696	1724	cmd.exe	35
PID 1724 wrote to memory of 1696	1724	cmd.exe	35
PID 1724 wrote to memory of 1696	1724	cmd.exe	35

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:832
- C:\Users\Admin\AppData\Local\Temp\is-IIMLN.tmp\is-1LJBQ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-IIMLN.tmp\is-1LJBQ.tmp" /SL4 $70120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2339680 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1240
- - C:\Program Files (x86)\fdSearcher\fdsearcher63.exe
    "C:\Program Files (x86)\fdSearcher\fdsearcher63.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2032
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5Caiccruwa.exe
      4⤵
      Executes dropped EXE
      PID:1524
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "fdsearcher63.exe" /f & erase "C:\Program Files (x86)\fdSearcher\fdsearcher63.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1724
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "fdsearcher63.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1696

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

fdsearcher63.exe

Path C:\Program Files (x86)\fdSearcher\fdsearcher63.exe
Size 3.8MB
SHA256 8de44a9d8af49220541fb08b87bad96c8d1436389cdb8613dd8b6f76894a4bc7
MD5 bd3e1e09391f5b227cfb4312f10f27c6
SHA1 d865547deafb45a4e1306476604d73a38d4d9167
SHA512 8cc429dc1e3d375b05b110d37795cc115f2f9da9f859f301a69a7ec766839d7cfe273a7392a8d91af3c7ea16a2bc76b574c523b3a1a277d65edfc565e009ab1e
SSDEEP 98304:uqnQ301HnNJvfZ0IKx4huBT3kKnnipl78:uqnQ301HNlfZ0vP8p18
MD5 SHA1 SHA512 SSDEEP

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fdsearcher63.exe

Path C:\Program Files (x86)\fdSearcher\fdsearcher63.exe
Size 3.8MB
SHA256 8de44a9d8af49220541fb08b87bad96c8d1436389cdb8613dd8b6f76894a4bc7
MD5 bd3e1e09391f5b227cfb4312f10f27c6
SHA1 d865547deafb45a4e1306476604d73a38d4d9167
SHA512 8cc429dc1e3d375b05b110d37795cc115f2f9da9f859f301a69a7ec766839d7cfe273a7392a8d91af3c7ea16a2bc76b574c523b3a1a277d65edfc565e009ab1e
SSDEEP 98304:uqnQ301HnNJvfZ0IKx4huBT3kKnnipl78:uqnQ301HNlfZ0vP8p18
MD5 SHA1 SHA512 SSDEEP

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is-1LJBQ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-IIMLN.tmp\is-1LJBQ.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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is-1LJBQ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-IIMLN.tmp\is-1LJBQ.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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5Caiccruwa.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5Caiccruwa.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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fdsearcher63.exe

Path \Program Files (x86)\fdSearcher\fdsearcher63.exe
Size 3.8MB
SHA256 8de44a9d8af49220541fb08b87bad96c8d1436389cdb8613dd8b6f76894a4bc7
MD5 bd3e1e09391f5b227cfb4312f10f27c6
SHA1 d865547deafb45a4e1306476604d73a38d4d9167
SHA512 8cc429dc1e3d375b05b110d37795cc115f2f9da9f859f301a69a7ec766839d7cfe273a7392a8d91af3c7ea16a2bc76b574c523b3a1a277d65edfc565e009ab1e
SSDEEP 98304:uqnQ301HnNJvfZ0IKx4huBT3kKnnipl78:uqnQ301HNlfZ0vP8p18
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-1LJBQ.tmp

Path \Users\Admin\AppData\Local\Temp\is-IIMLN.tmp\is-1LJBQ.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-OPM7B.tmp\_isetup\_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-OPM7B.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-OPM7B.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

Submit Download

5Caiccruwa.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5Caiccruwa.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/832-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

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memory/832-68-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/832-55-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/832-87-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1240-69-0x0000000003220000-0x00000000043E1000-memory.dmp

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memory/1240-74-0x0000000003220000-0x00000000043E1000-memory.dmp

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memory/2032-75-0x0000000000400000-0x00000000015C1000-memory.dmp

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memory/2032-79-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2032-83-0x0000000000400000-0x00000000015C1000-memory.dmp

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memory/2032-73-0x0000000000400000-0x00000000015C1000-memory.dmp

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memory/2032-86-0x0000000000400000-0x00000000015C1000-memory.dmp

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memory/2032-71-0x0000000000400000-0x00000000015C1000-memory.dmp

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memory/2032-70-0x0000000000400000-0x00000000015C1000-memory.dmp

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