nymaim | 27a81695f86df634eb78d50e113ca490764c4f190f5b963f097ebcbdfa36faae

Analysis

max time kernel
129s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
16/11/2022, 04:48

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General

Target
file.exe
Size 1.9MB
Sample221116-fe4mkshb85
SHA256 27a81695f86df634eb78d50e113ca490764c4f190f5b963f097ebcbdfa36faae
MD5 d4347dcc7b2e6520ee35ce6058bc8ab6
SHA1 21901bb6a98595d1320cdfa3111386d442d48970
SHA512 eed0ac701b57dcc579e4bc314987c74691efeae19377e59684665439c9e9e36cecd31e217736d0811cc1f29c8892c3a530ce0000cb31864f5abc0ea07601435e
SSDEEP 49152:q2K7ypkvBQsineL39r5J2uEg45lhFBdg6zpe18x5qCdyHfRx7Pq2:rK7ypk4W1JrklhjdgEe1r1PD
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
2144	is-T7M68.tmp
1668	gnsearcher81.exe
920	RPgIFGhEO.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	gnsearcher81.exe

Loads dropped DLL 1 IoCs

pid	Process
2144	is-T7M68.tmp

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)\gnSearcher\is-BQV5Q.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-8UJU6.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-EHR1V.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-5QU6T.tmp	is-T7M68.tmp
File opened for modification	C:\Program Files (x86)\gnSearcher\unins000.dat	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\unins000.dat	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-O9CVO.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-0PRUD.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-0FEUU.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-UUDTG.tmp	is-T7M68.tmp
File created	C:\Program Files (x86)\gnSearcher\is-PS7KU.tmp	is-T7M68.tmp
File opened for modification	C:\Program Files (x86)\gnSearcher\gnsearcher81.exe	is-T7M68.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
4092	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1668	gnsearcher81.exe
1668	gnsearcher81.exe
1668	gnsearcher81.exe
1668	gnsearcher81.exe
1668	gnsearcher81.exe
1668	gnsearcher81.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4092	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 2144	5048	file.exe	80
PID 5048 wrote to memory of 2144	5048	file.exe	80
PID 5048 wrote to memory of 2144	5048	file.exe	80
PID 2144 wrote to memory of 1668	2144	is-T7M68.tmp	81
PID 2144 wrote to memory of 1668	2144	is-T7M68.tmp	81
PID 2144 wrote to memory of 1668	2144	is-T7M68.tmp	81
PID 1668 wrote to memory of 920	1668	gnsearcher81.exe	82
PID 1668 wrote to memory of 920	1668	gnsearcher81.exe	82
PID 1668 wrote to memory of 920	1668	gnsearcher81.exe	82
PID 1668 wrote to memory of 2328	1668	gnsearcher81.exe	87
PID 1668 wrote to memory of 2328	1668	gnsearcher81.exe	87
PID 1668 wrote to memory of 2328	1668	gnsearcher81.exe	87
PID 2328 wrote to memory of 4092	2328	cmd.exe	89
PID 2328 wrote to memory of 4092	2328	cmd.exe	89
PID 2328 wrote to memory of 4092	2328	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Users\Admin\AppData\Local\Temp\is-GLNCS.tmp\is-T7M68.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GLNCS.tmp\is-T7M68.tmp" /SL4 $90046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1770521 54784
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2144
- - C:\Program Files (x86)\gnSearcher\gnsearcher81.exe
    "C:\Program Files (x86)\gnSearcher\gnsearcher81.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1668
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RPgIFGhEO.exe
      4⤵
      Executes dropped EXE
      PID:920
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "gnsearcher81.exe" /f & erase "C:\Program Files (x86)\gnSearcher\gnsearcher81.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2328
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "gnsearcher81.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4092

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

gnsearcher81.exe

Path C:\Program Files (x86)\gnSearcher\gnsearcher81.exe
Size 2.6MB
SHA256 e032e0f9b6a509943d78ee8b6db14323cb6a06f8d5f24b156b7e0604aa449162
MD5 2d409d12fe9affb3eef9965cc6a20df3
SHA1 e8776fdd6c7f270c327cacf7bfe6c40109763653
SHA512 c29fd031cf733fab2bc537e3bdc49a2f25b531eeccd0542848e41cd2f302eaffed8339df1eccc8a873048d2662e46015e89c6e0f043f75aeb9c7ed8f88a6eeab
SSDEEP 49152:Ca3lgLecIYeCPVSb1+/zSCvBUMMS5dhQLt0ioSAyqSMxnFe+:ruPkbuOABUMMS5dhQ6iovjBxnFe+
MD5 SHA1 SHA512 SSDEEP

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gnsearcher81.exe

Path C:\Program Files (x86)\gnSearcher\gnsearcher81.exe
Size 2.6MB
SHA256 e032e0f9b6a509943d78ee8b6db14323cb6a06f8d5f24b156b7e0604aa449162
MD5 2d409d12fe9affb3eef9965cc6a20df3
SHA1 e8776fdd6c7f270c327cacf7bfe6c40109763653
SHA512 c29fd031cf733fab2bc537e3bdc49a2f25b531eeccd0542848e41cd2f302eaffed8339df1eccc8a873048d2662e46015e89c6e0f043f75aeb9c7ed8f88a6eeab
SSDEEP 49152:Ca3lgLecIYeCPVSb1+/zSCvBUMMS5dhQLt0ioSAyqSMxnFe+:ruPkbuOABUMMS5dhQ6iovjBxnFe+
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-8BO2S.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-T7M68.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-GLNCS.tmp\is-T7M68.tmp
Size 659KB
SHA256 fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409
MD5 34a3efb47055787f7a4537fb08fb93ec
SHA1 7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9
SHA512 055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff
SSDEEP 12288:1kxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphjxgA:SFRCUn4rP/37YzHXA6QJsoPtIpxxgA
MD5 SHA1 SHA512 SSDEEP

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is-T7M68.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-GLNCS.tmp\is-T7M68.tmp
Size 659KB
SHA256 fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409
MD5 34a3efb47055787f7a4537fb08fb93ec
SHA1 7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9
SHA512 055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff
SSDEEP 12288:1kxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphjxgA:SFRCUn4rP/37YzHXA6QJsoPtIpxxgA
MD5 SHA1 SHA512 SSDEEP

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RPgIFGhEO.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RPgIFGhEO.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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RPgIFGhEO.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\RPgIFGhEO.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/1668-143-0x0000000000400000-0x00000000014A4000-memory.dmp

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memory/1668-142-0x0000000000400000-0x00000000014A4000-memory.dmp

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memory/1668-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1668-152-0x0000000000400000-0x00000000014A4000-memory.dmp

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memory/1668-155-0x0000000000400000-0x00000000014A4000-memory.dmp

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memory/5048-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/5048-134-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/5048-151-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/5048-156-0x0000000000400000-0x0000000000414000-memory.dmp

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