nymaim | 0bbe14bcb6a69eab510f6223256ce356b2d0d21dd4ff449594217bfccef9bb84

General

Target

4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe
Size

2.4MB
MD5

b2c6b3363df999810d16e871f5124581
SHA1

b2ac167eacdd584b712d5460f91365168addbd65
SHA256

4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87
SHA512

7da471485cc38cf91d246e8d46606c4ec619ae5b867cc234de0aba47f5caaec95f61242f20e92328618386c431584b30c85fa6ec0c864043389c6f9cf53028f5
SSDEEP

49152:Z2P/vOk2Cz2bnnZ9wRmTb0YtY1UBX8gjjMh8+V/B5c8wmbNczX5z9Ap0cnWfA5hq:Mfd2w2zPww0YY1CX8OcV/TRwmW1zBqWt

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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
3996	is-CKH9H.tmp
1184	fbsearcher62.exe
4876	CQ1Buanwq6u.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	fbsearcher62.exe

Loads dropped DLL 1 IoCs

pid	Process
3996	is-CKH9H.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)\fbSearcher\is-427NB.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-AQJVV.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-S68E5.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-3F16A.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-0JC88.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-BAOT7.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-IRAU7.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-0OASI.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\is-2TFIF.tmp	is-CKH9H.tmp
File created	C:\Program Files (x86)\fbSearcher\unins000.dat	is-CKH9H.tmp
File opened for modification	C:\Program Files (x86)\fbSearcher\fbsearcher62.exe	is-CKH9H.tmp
File opened for modification	C:\Program Files (x86)\fbSearcher\unins000.dat	is-CKH9H.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
1992	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1184	fbsearcher62.exe
1184	fbsearcher62.exe
1184	fbsearcher62.exe
1184	fbsearcher62.exe
1184	fbsearcher62.exe
1184	fbsearcher62.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 3996	2760	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	81
PID 2760 wrote to memory of 3996	2760	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	81
PID 2760 wrote to memory of 3996	2760	4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe	81
PID 3996 wrote to memory of 1184	3996	is-CKH9H.tmp	82
PID 3996 wrote to memory of 1184	3996	is-CKH9H.tmp	82
PID 3996 wrote to memory of 1184	3996	is-CKH9H.tmp	82
PID 1184 wrote to memory of 4876	1184	fbsearcher62.exe	85
PID 1184 wrote to memory of 4876	1184	fbsearcher62.exe	85
PID 1184 wrote to memory of 4876	1184	fbsearcher62.exe	85
PID 1184 wrote to memory of 4540	1184	fbsearcher62.exe	92
PID 1184 wrote to memory of 4540	1184	fbsearcher62.exe	92
PID 1184 wrote to memory of 4540	1184	fbsearcher62.exe	92
PID 4540 wrote to memory of 1992	4540	cmd.exe	94
PID 4540 wrote to memory of 1992	4540	cmd.exe	94
PID 4540 wrote to memory of 1992	4540	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe
"C:\Users\Admin\AppData\Local\Temp\4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Users\Admin\AppData\Local\Temp\is-2263A.tmp\is-CKH9H.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-2263A.tmp\is-CKH9H.tmp" /SL4 $A0032 "C:\Users\Admin\AppData\Local\Temp\4a75d423320fd96f2702fc780f438337c7b3e1754b0ee590a021cf8b3094ef87.exe" 2311436 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3996
- - C:\Program Files (x86)\fbSearcher\fbsearcher62.exe
    "C:\Program Files (x86)\fbSearcher\fbsearcher62.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1184
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\CQ1Buanwq6u.exe
      4⤵
      Executes dropped EXE
      PID:4876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "fbsearcher62.exe" /f & erase "C:\Program Files (x86)\fbSearcher\fbsearcher62.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4540
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "fbsearcher62.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1992

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\fbSearcher\fbsearcher62.exe

Filesize
3.8MB

MD5
491cdf7b3490fc39ba9fe362705ea216

SHA1
31c07f3f5989a1e77b499d9ce50801a7b76d249a

SHA256
2449e098b688a50d4897c202e790f7d1450a56a73ef5109417ea50bd9d38c5c3

SHA512
1cd931e8140e3ee55653e0094c8217300b5cd882845a76780a854775e0fc698511542ac65b4ba2c5a5c5c62ffb17262f924b153812de413cffd0f9177d01cab0

Download Submit
C:\Program Files (x86)\fbSearcher\fbsearcher62.exe

Filesize
3.8MB

MD5
491cdf7b3490fc39ba9fe362705ea216

SHA1
31c07f3f5989a1e77b499d9ce50801a7b76d249a

SHA256
2449e098b688a50d4897c202e790f7d1450a56a73ef5109417ea50bd9d38c5c3

SHA512
1cd931e8140e3ee55653e0094c8217300b5cd882845a76780a854775e0fc698511542ac65b4ba2c5a5c5c62ffb17262f924b153812de413cffd0f9177d01cab0

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-2263A.tmp\is-CKH9H.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-2263A.tmp\is-CKH9H.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-5HUT1.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\CQ1Buanwq6u.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\CQ1Buanwq6u.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1184-154-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/1184-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1184-157-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/1184-143-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/1184-140-0x0000000000000000-mapping.dmp

Download
memory/1184-145-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/1184-144-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/1184-146-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/1992-156-0x0000000000000000-mapping.dmp

Download
memory/2760-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2760-139-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2760-134-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2760-158-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3996-135-0x0000000000000000-mapping.dmp

Download
memory/4540-155-0x0000000000000000-mapping.dmp

Download
memory/4876-147-0x0000000000000000-mapping.dmp

Download

Analysis

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