nymaim | bd3afef31a3ac7b0c638f1c159e205f8bc5edf036c1d7e0803f3c4e4a10ed01f

Analysis

max time kernel
136s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
12/11/2022, 01:03

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General

Target
file.exe
Size 2.9MB
Sample221112-becrmscg38
SHA256 bd3afef31a3ac7b0c638f1c159e205f8bc5edf036c1d7e0803f3c4e4a10ed01f
MD5 000e03e44c349283d927f67ca9b72bff
SHA1 52a793248b6803357b2043404fd73cbd22433ef4
SHA512 12f9f6d540e06016c73bec8bb4c7fad1793a1d6b0d97e0eb5e172dc8f461c64a9da79a83e952529d6d1d37948060939945c2f786a69fa557bdf5d3a683f73cb6
SSDEEP 49152:Z2e0WTVImN4NlB/Whi4uFZxL/PNdAnL3puve4DMGyeKedsddQH1DlLwA5hq:ML22mmp/WUXZ+3UW4IGyensMHTvDq
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
4088	is-CBMTT.tmp
4740	gdsearcher76.exe
4772	EYMCtVVc2py1By.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	gdsearcher76.exe

Loads dropped DLL 1 IoCs

pid	Process
4088	is-CBMTT.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)\gdSearcher\is-PBDS0.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-99AG7.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-AD2GH.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-3T4Q6.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-FH4HE.tmp	is-CBMTT.tmp
File opened for modification	C:\Program Files (x86)\gdSearcher\unins000.dat	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\unins000.dat	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-0K3A0.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-696OB.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-NJ0UJ.tmp	is-CBMTT.tmp
File created	C:\Program Files (x86)\gdSearcher\is-TH97T.tmp	is-CBMTT.tmp
File opened for modification	C:\Program Files (x86)\gdSearcher\gdsearcher76.exe	is-CBMTT.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
1244	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4740	gdsearcher76.exe
4740	gdsearcher76.exe
4740	gdsearcher76.exe
4740	gdsearcher76.exe
4740	gdsearcher76.exe
4740	gdsearcher76.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1244	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5092 wrote to memory of 4088	5092	file.exe	80
PID 5092 wrote to memory of 4088	5092	file.exe	80
PID 5092 wrote to memory of 4088	5092	file.exe	80
PID 4088 wrote to memory of 4740	4088	is-CBMTT.tmp	81
PID 4088 wrote to memory of 4740	4088	is-CBMTT.tmp	81
PID 4088 wrote to memory of 4740	4088	is-CBMTT.tmp	81
PID 4740 wrote to memory of 4772	4740	gdsearcher76.exe	82
PID 4740 wrote to memory of 4772	4740	gdsearcher76.exe	82
PID 4740 wrote to memory of 4772	4740	gdsearcher76.exe	82
PID 4740 wrote to memory of 3116	4740	gdsearcher76.exe	90
PID 4740 wrote to memory of 3116	4740	gdsearcher76.exe	90
PID 4740 wrote to memory of 3116	4740	gdsearcher76.exe	90
PID 3116 wrote to memory of 1244	3116	cmd.exe	92
PID 3116 wrote to memory of 1244	3116	cmd.exe	92
PID 3116 wrote to memory of 1244	3116	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Users\Admin\AppData\Local\Temp\is-F2T6L.tmp\is-CBMTT.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-F2T6L.tmp\is-CBMTT.tmp" /SL4 $A0030 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2763476 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4088
- - C:\Program Files (x86)\gdSearcher\gdsearcher76.exe
    "C:\Program Files (x86)\gdSearcher\gdsearcher76.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4740
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\EYMCtVVc2py1By.exe
      4⤵
      Executes dropped EXE
      PID:4772
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "gdsearcher76.exe" /f & erase "C:\Program Files (x86)\gdSearcher\gdsearcher76.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3116
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "gdsearcher76.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1244

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

gdsearcher76.exe

Path C:\Program Files (x86)\gdSearcher\gdsearcher76.exe
Size 4.3MB
SHA256 4ca47436e9e8320ae40197f95b68423a8ceb9287f7f7b575b911c37403fd813c
MD5 e517f517d99bbc83134acba8066845a0
SHA1 0fe5116239b0bfd2bb5318993e5d646bd9b10dcf
SHA512 a1314f5086fb2cdaf9c6397ea7c2ee3ba6b6262bf0d527e2554977e28d9c76ef0e9dc12e9bc505f4960fc678031db1eedb52ce8e57aacf5205449320da3605c0
SSDEEP 98304:12kbuOIBUMMS5dhQ65bVHfsXjLZDKFoJ5ahcuHkfmGK:1sPnR5ytScckfVK
MD5 SHA1 SHA512 SSDEEP

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gdsearcher76.exe

Path C:\Program Files (x86)\gdSearcher\gdsearcher76.exe
Size 4.3MB
SHA256 4ca47436e9e8320ae40197f95b68423a8ceb9287f7f7b575b911c37403fd813c
MD5 e517f517d99bbc83134acba8066845a0
SHA1 0fe5116239b0bfd2bb5318993e5d646bd9b10dcf
SHA512 a1314f5086fb2cdaf9c6397ea7c2ee3ba6b6262bf0d527e2554977e28d9c76ef0e9dc12e9bc505f4960fc678031db1eedb52ce8e57aacf5205449320da3605c0
SSDEEP 98304:12kbuOIBUMMS5dhQ65bVHfsXjLZDKFoJ5ahcuHkfmGK:1sPnR5ytScckfVK
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-8GLT2.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-CBMTT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-F2T6L.tmp\is-CBMTT.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-CBMTT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-F2T6L.tmp\is-CBMTT.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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EYMCtVVc2py1By.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\EYMCtVVc2py1By.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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EYMCtVVc2py1By.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\EYMCtVVc2py1By.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/4740-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4740-144-0x0000000000400000-0x000000000164F000-memory.dmp

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memory/4740-142-0x0000000000400000-0x000000000164F000-memory.dmp

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memory/4740-143-0x0000000000400000-0x000000000164F000-memory.dmp

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memory/4740-152-0x0000000000400000-0x000000000164F000-memory.dmp

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memory/4740-155-0x0000000000400000-0x000000000164F000-memory.dmp

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memory/5092-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/5092-138-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/5092-156-0x0000000000400000-0x0000000000414000-memory.dmp

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